# -*- coding: future_fstrings -*-
# mautrix-telegram - A Matrix-Telegram puppeting bridge
# Copyright (C) 2018 Tulir Asokan
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
from typing import Dict

from sqlalchemy import (Column, UniqueConstraint, ForeignKey, ForeignKeyConstraint, Integer,
                        BigInteger, String, Boolean, Text)
from sqlalchemy.sql import expression
from sqlalchemy.orm import relationship, Query
import json

from .base import Base


class Portal(Base):
    query = None  # type: Query
    __tablename__ = "portal"

    # Telegram chat information
    tgid = Column(Integer, primary_key=True)
    tg_receiver = Column(Integer, primary_key=True)
    peer_type = Column(String, nullable=False)
    megagroup = Column(Boolean)

    # Matrix portal information
    mxid = Column(String, unique=True, nullable=True)

    # Telegram chat metadata
    username = Column(String, nullable=True)
    title = Column(String, nullable=True)
    about = Column(String, nullable=True)
    photo_id = Column(String, nullable=True)


class Message(Base):
    query = None  # type: Query
    __tablename__ = "message"

    mxid = Column(String)
    mx_room = Column(String)
    tgid = Column(Integer, primary_key=True)
    tg_space = Column(Integer, primary_key=True)

    __table_args__ = (UniqueConstraint("mxid", "mx_room", "tg_space", name="_mx_id_room"),)


class UserPortal(Base):
    query = None  # type: Query
    __tablename__ = "user_portal"

    user = Column(Integer, ForeignKey("user.tgid", onupdate="CASCADE", ondelete="CASCADE"),
                  primary_key=True)
    portal = Column(Integer, primary_key=True)
    portal_receiver = Column(Integer, primary_key=True)

    __table_args__ = (ForeignKeyConstraint(("portal", "portal_receiver"),
                                           ("portal.tgid", "portal.tg_receiver"),
                                           onupdate="CASCADE", ondelete="CASCADE"),)


class User(Base):
    query = None  # type: Query
    __tablename__ = "user"

    mxid = Column(String, primary_key=True)
    tgid = Column(Integer, nullable=True, unique=True)
    tg_username = Column(String, nullable=True)
    saved_contacts = Column(Integer, default=0, nullable=False)
    contacts = relationship("Contact", uselist=True,
                            cascade="save-update, merge, delete, delete-orphan")
    portals = relationship("Portal", secondary="user_portal")


class RoomState(Base):
    query = None  # type: Query
    __tablename__ = "mx_room_state"

    room_id = Column(String, primary_key=True)
    _power_levels_text = Column("power_levels", Text, nullable=True)
    _power_levels_json = {}  # type: Dict

    @property
    def has_power_levels(self) -> bool:
        return bool(self._power_levels_text)

    @property
    def power_levels(self) -> Dict:
        if not self._power_levels_json and self._power_levels_text:
            self._power_levels_json = json.loads(self._power_levels_text)
        return self._power_levels_json

    @power_levels.setter
    def power_levels(self, val: Dict) -> None:
        self._power_levels_json = val
        self._power_levels_text = json.dumps(val)


class UserProfile(Base):
    query = None  # type: Query
    __tablename__ = "mx_user_profile"

    room_id = Column(String, primary_key=True)
    user_id = Column(String, primary_key=True)
    membership = Column(String, nullable=False, default="leave")
    displayname = Column(String, nullable=True)
    avatar_url = Column(String, nullable=True)

    def dict(self) -> Dict[str, str]:
        return {
            "membership": self.membership,
            "displayname": self.displayname,
            "avatar_url": self.avatar_url,
        }


class Contact(Base):
    query = None  # type: Query
    __tablename__ = "contact"

    user = Column(Integer, ForeignKey("user.tgid"), primary_key=True)
    contact = Column(Integer, ForeignKey("puppet.id"), primary_key=True)


class Puppet(Base):
    query = None  # type: Query
    __tablename__ = "puppet"

    id = Column(Integer, primary_key=True)
    custom_mxid = Column(String, nullable=True)
    access_token = Column(String, nullable=True)
    displayname = Column(String, nullable=True)
    displayname_source = Column(Integer, nullable=True)
    username = Column(String, nullable=True)
    photo_id = Column(String, nullable=True)
    is_bot = Column(Boolean, nullable=True)
    matrix_registered = Column(Boolean, nullable=False, server_default=expression.false())


# Fucking Telegram not telling bots what chats they are in 3:<
class BotChat(Base):
    query = None  # type: Query
    __tablename__ = "bot_chat"
    id = Column(Integer, primary_key=True)
    type = Column(String, nullable=False)


class TelegramFile(Base):
    query = None  # type: Query
    __tablename__ = "telegram_file"

    id = Column(String, primary_key=True)
    mxc = Column(String)
    mime_type = Column(String)
    was_converted = Column(Boolean)
    timestamp = Column(BigInteger)
    size = Column(Integer, nullable=True)
    width = Column(Integer, nullable=True)
    height = Column(Integer, nullable=True)
    thumbnail_id = Column("thumbnail", String, ForeignKey("telegram_file.id"), nullable=True)
    thumbnail = relationship("TelegramFile", uselist=False)


def init(db_session) -> None:
    Portal.query = db_session.query_property()
    Message.query = db_session.query_property()
    UserPortal.query = db_session.query_property()
    User.query = db_session.query_property()
    Puppet.query = db_session.query_property()
    BotChat.query = db_session.query_property()
    TelegramFile.query = db_session.query_property()
    UserProfile.query = db_session.query_property()
    RoomState.query = db_session.query_property()